Zac Efron - Rebounding

After hanging up his Wildcats jersey, Efron has gone on to have the most successful career out of all the "HSM" alums. He's starred in several films including "Hairspray," "17 Again," "Charlie St. Cloud" and "The Lucky One," on top of having started his own production company, Ninjas Runnin'...

After hanging up his Wildcats jersey, Efron has gone on to have the most successful career out of all the "HSM" alums. He's starred in several films including "Hairspray," "17 Again," "Charlie St. Cloud" and "The Lucky One," on top of having started his own production company, Ninjas Runnin'... (Getty Images)

After hanging up his Wildcats jersey, Efron has gone on to have the most successful career out of all the "HSM" alums. He's starred in several films including "Hairspray," "17 Again," "Charlie St. Cloud" and "The Lucky One," on top of having started his own production company, Ninjas Runnin'...Getty Images